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Lect 2 - Electronic Atlases Electronic Atlases Continuum E. Atlas--------Thematic Mapper--CAC----------GIS
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Lect 2 - Electronic Atlases Electronic Atlas Map on the web, disk, CD,... Static -- what you see is what you get Descriptive Data Storage Limited Goals/Limited Uses in mind May have unexpected/unused information
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Lect 2 - Electronic Atlases E. Atlas As Display –constructed with limited goals As Storage –medium for organizing & archieving –difficult to extract raw data
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Lect 2 - Electronic Atlases Thematic Mapper/CAC Dynamic mapping system within highly structured constraints One or more sets of data (attributes) One or more sets of spatial objects(entities) –points, lines, polygons Apply data to objects
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Lect 2 - Electronic Atlases Thematic Mapper Display -- semi-dynamic, able to create numerous maps –50 states as entities –census data like income, age, ethinicity as attributes –number of maps limited to number of attributes
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Lect 2 - Electronic Atlases Thematic Mapper Storage -- attribute data linked to entities –given data easily manipulated for display High end systems (CAC -- Computer Aided Cartography) –Allow importation of additional data –Allow limited logical and mathematical functions
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Lect 2 - Electronic Atlases GIS Fully Dynamic –Describes, Predicts, Prescribes Display –Up to the user –Up to the minute Storage –Ideal location to store, edit, organize, & manage large data sets
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